Hi VJ, welcome to AC!
Ok, so there are a few things I would like to address.
1) The current stock you have are not recommended to be kept together. Peacocks and mbuna (the yellow labs) are typically not a good match as a full grown peacock could swallow a mid size mbuna. Also, aggression levels will not match.
2) For the fish you have, size and quantity, you're going to want a 90 gallon tank. If this is not the size of tank you are planning to upgrade to, I would recommend returning the cichlids and going with smaller dwarf cichlids. Either the SA dwarf cichlids, Jewels, brichardi, or shell dwelling African cichlids. As well as a smaller species of pleco, like the bushy nose, clown, or rubber lip species. The pleco alone will need at least a 90 gallon if not bigger.
3) The parrot cichlid is south American and will not be compatible with African cichlids for many reasons. Such as ability to compete for food, aggression levels, and preferred water parameters. The African cichlids that you currently have like hard water with a pH of about 8.2 - 8.5, while the south American parrot is going to like soft water with a pH of about 6-6.5 or neutral of 7.